Racing Brainteaser
A car travels around a one kilometre track with an average speed of 30kph. What speed will the car have to average in the second lap to have an average speed of 60kph over both laps?
A car travels around a one kilometre track with an average speed of 30kph. What speed will the car have to average in the second lap to have an average speed of 60kph over both laps?
